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SteveBz

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About SteveBz

  • Rank
    Proto Star

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  • Location
    West Sussex
  1. SteveBz

    CG-5 Strip down. Damaged grub screw.

    Indeed. But somehow my eagerness got the better of me and I was soon collimating my polarscope against the treeline. I have a reminder to buy new grubs.
  2. SteveBz

    CG-5 Strip down. Damaged grub screw.

    If you go into Wickes, there are a number of versions. The original is now sold as "Penetrating" but there are many other versions for other functions. I imagine the marketing boys will soon have one for frying chips. Steve
  3. SteveBz

    CG-5 Strip down. Damaged grub screw.

    So finally I soaked it in WD40 and bought new allen keys and it came apart. So success until next year!! Thanks everyone Steve.
  4. SteveBz

    CG-5 Strip down. Damaged grub screw.

    No, I could try that. Thanks.
  5. SteveBz

    CG-5 Strip down. Damaged grub screw.

    That's probably the first thing to try. I saw a suggestion (for removing hand-gun grubs) for super-gluing the allen-key in place. My slight concern is that I might not be able to do this both of these because the oil would cause the super-glue to slip. Maybe I could superglue (or araldite) and then WD40 at the same time. So let the araldite set over night one and then the wd40 over night two and try on day 3. And then scream and shout and throw things before getting out the angle grinder. Thanks for your help. Steve.
  6. SteveBz

    CG-5 Strip down. Damaged grub screw.

    This one here: http://www.astronomyboy.com/cg5/ Yes, I'm reluctantly coming to that conclusion myself. The issue is that it's still pinning the shaft underneath, so drilling will damage that too!! I'm going to try to rank the suggestions in order of destructiveness and do the least destructive first. Drilling comes towards the bottom of the list just above throwing it off a high building and hoping it jolts loose. Thanks for your help. Steve
  7. Hi Guys, I'm doing a strip down of my EQ5 according to Astro boy's instructions and I think I have a damaged grub here: Any thoughts about removing or replacing the grub? It's the inner grub on the collar attached to the ra shaft, accessed through the outer ra setting circle. Thanks Steve.
  8. SteveBz

    m57 - second attempt

    So here I re-processed it a little (given that it's raining). Do you think this is better than before or not quite so good?
  9. SteveBz

    m57 - second attempt

    Well, I might try again without the TV and with longer frames, if I get some clear sky. It's looking a bit wet and overcast this week. Thanks for the advice and help. Regards Steve.
  10. SteveBz

    m57 - second attempt

    Great photo. How long were the frames and how did you process it? The white dwarf in the centre is clearly visible.
  11. SteveBz

    m57 - second attempt

    Hi Mike, So you think ditch the Barlow for DSO, reduce the ISO to ISO1600 and take more exposures? Or take longer exposures? Maybe if the magnification were less, the guiding limitations would not be so obvious. Possibly I could get the equivalent of greater magnification using dithering on guiding and the drizzle option on DSS ? What do you think? Regards, Steve.
  12. SteveBz

    m57 - second attempt

    Hi Mike, So my issues seem to be: 1) Focal length, which I tried to improve that with the TeleVue x2 Barlow. Although it says x2, it looks more like x3 or 4 and I haven't cropped either photo. If it were x3, that would make the FL 3000 mm. The white dwarf in the centre is not very point-like, and I put that down to the glass in the TV Barlow. I think If really I want to improve it I need to switch out my x5 Newtonian for a x9 or x10 instrument (for similar aperture). Eg a SC or Mak. 2) Length of guiding. My CG5 was used and frozen when I bought it. Although it works nicely now, the guiding error is still 3" which is not the best, so I keep it to short exposures. My real question is, do you think the TV Barlow has helped or not with DSO photography. Maybe it's best to reserve for planetary. Regards, Steve
  13. SteveBz

    m57 - second attempt

    Oh, sorry that was a typo. All the ISOs were 6400. I'll update it. Steve.
  14. SteveBz

    m57 - second attempt

    Hi Guys, Here are this year's and last year's attempts at M57. They both use a C8-N with a driven CG5 and DSLR. They both consist of 30 second fames. The main difference is that this one has a x2 Barlow lens (Televue) and guiding. The 2018 one had a 2" light train with coma corrector and light pollution filter, which I had to dispense with because the TV Barlow was 1.25". The DSLR is mains powered here. Maybe it's my imagination, but I think the RAW frames are a bit noisier. Neither of them have flats and you can see the vignetting in the 2017 image, which disappears. with the Barlow in play. Maybe I'll take some flats for this image and apply them, but I don't see much to correct. This one is: 203 mm Newtonian telescope. Nominal FL 1000 mm. DSLR Nikon D5000. ISO6400. 32 x 30 second subs 30 x 30 sec darks. ISO6400. 6 deg C. 30 x Biases. ISO6400 TeleVue 2xBarlow Guiding ZWO ASI120mm + 227mm FL 60 mm Guidescope CG-5 mount with enhanced handset and Arduino control. Processing with DSS and Gimp 9.2 (Exposure and black adjustment only) The TeleVue has certainly made the image bigger and you can see the white dwarf at it's centre. But it not as good as many of the others on here with similar equipment. Any suggestions for further improvement? Regards Steve.
  15. Ok, thanks, Same questions. As SW.
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